Driving-gear for sieves



No. 228,758. Patented Jun e-15, 1880.

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UNITED STATES PATENT OFFICE.

JOSEPH D. HOBBS, OF BURLINGTON, IOWA.

DRIVING-GEAR FOR SIEVES, GRAlN-Rl DDLES, 80C.

SPECIFICATION forming part of Letters Patent No. 228,758, dated June 15,1880.

Application filed February 10, 1880.

To all whom it may concern Be it known that I, JOSEPH D. HOBBS, ofBurlington, in the county of Des Moines and State of Iowa, have inventeda new and useful Improvement in Driving-Gearing for Sieves,Grain-Riddles, and Feeders, of which the following is a specification.

The invention relates to driving-gearing for sieves, grain-riddles, andfeeding machinery in general.

Heretofore the driving machinery for sieves, grain-riddles, and forfeeders has been simply of the pitmau motion with the common wheel orthe wheel and crank in combination; but these motions are objectionable,since the motion obtained is not capable of regulating in its rapiditywithout causing the whole machinery connected therewith to be likewiseregulated, either faster or slower, as the case may be. Then it isfurther objectionable in that the shock or kick is always the same-thesame jerk. It is further objectionable in the case of feeders, since themotion and movement is always directly back and forth, shoving thepitman straight backward and forward, and always reaching the samedistance.

The object of my invention is to provide a system of driving-gearingforsieves, grain-riddles, and for feeding machinery, which may be regulatedin its rapidity or motion, regulated in its shocks or jerks, and themovement of the pitman changed to suit the motion desired and all thiscan be done without a change or alteration in the propelling machinery,and to further provide a long or short stroke of the pitman by boltadjustment. I attain this object by mechanism illustrated in theaccompanying drawings, in which Figure 1 represents a front view. Fig. 2rep resents a side view, and Fig. 3 represents the different forms oflevers and boxing.

The invention consists in a wheel, A, with arms B B B, 850., extendingfrom the rim alternately on opposite sides, with square or curved base,according to the motion required. The wheel A revolves on an ordinaryhub. The yoke D, with its pivots or gudgeons O O, is supported by anupright circular post which fits in the pipe-boxing E. This boxing isflanged at the top, which makes the washer between the yoke D and thewood-work supporting the pipe-boxing. The post in the boxing E passes onthrough the square F in the crank H, which post is then held to itsplace by a burr at the bottom.

The crank H is slotted at the point G, where the bolt L is inserted. Theloose connectingbars J J J have a slot, P, at the point where the bolt Lpasses through it, and straight or curved slot S, according to themotion desired, through which the pipe-boxing F passes.

The operation of the device is as follows: Remove the not from thebottom of the post in the boxing E take off the crank H and the nut ofbolt L. Then put J J J according to the motion desired, with the slot Sover the boxing F and the slot P over the bolt L. Then put the bar on Land the bottom of the post in E. Attach the crank or belt, as the casemay be, to the hub of the wheel A, and set it in motion. This turningforces the arms B B, &c., alternately against the pivots O U, whichvibrate correspondingly. This sets the yoke D in motion, which moves thecrank H. The bolt L, being adjusted to H in the slot G, moves with it.It also, being on the slot P of the bar J, moves the bar incorrespondence with the crank H. This throwing of the bar J back andforth moves the slot S of said bar along the boxing E. The motion thusgiven to the bar J will be according to the slope or shape of the slotS. The slot S gives direction to the bar J, which is attached to themachinery or sieve to be operated, and according to the bar used suchwill be the motion regulated by the slot S. The slot P in the bar J isfor regulating the length of the stroke. The farther the bolt L is fromthe boxing E in the slot P the longer will be the stroke given to thebar J. The nearer the bolt is the shorter will be the stroke.

The movement procured by putting J into the gearing will be a simpleside movement; by inserting J a double movement, and J a circularmotion.

What I claim is A device for converting rotary into reciprocatingmotion, consisting of the wheel A, yoke D, and pivots and crank H, andeither of the double-slotted connecting-bars J, J, or J substantially asand for the purpose set forth.

JOSEPH D. HOBBS.

Attest:

R. P. ROBINSON, FRANK FULLER.

